Linotype-machine



(No Model.) j

N. A. LARKIN. LINOTYPE MACHINE.

Patented Mar. 24, 1896.

. UNITED STATES PATENT OFFICE.

NELSON A. LARKIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MERGEN- THALERLINOTYPE COMPANY, OF NEW JERSEY.

LINOTYPE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 556,993, dated March24, 1896. I

Application filed January 31,1896. Serial No. 577,5 '75. (No model.)

T0 at whom it may concern.-

Be it known that I, NELSON A. LARKIN, of Chicago, county of Cook, andState of Illinois, have invented a new and useful Improvement inLinotype-Machines, of which the following is a specification.

I11 linotype-machinessuch, for example, as those represented in LettersPatent of the United States issued to Ottmar Mergenthaler, datedSeptember 16, 1890, Serial No. 436,53o it is desirable to prevent theoperation of the pump-plunger which delivers molten metal to the mold inthe event of the matrix-line being too short or of there being no lineof matrices in front of the mold. In such event the lever for raisingthe j ustifying-wedges in the line, commonly known as thejustifyinglever, will rise to an abnormal height.

My invention relates to a pump stop device through which this abnormalrise of the justifying-lever is utilized in a simple and effectivemanner.

The invention consists in a stop lever pivoted to the metal-pot or othersuitable part of the machine, its lower end being arranged in positionto be acted upon by the justifyinglever whenever it rises to an extremeheight and its upper end in position to engage the pump-lever.

The accompanying drawing represents the melting-pot and adjacent partsof the Mergenthaler machine with my improvement applied thereto.

The drawing is limited to such parts as are necessary to anunderstanding of my invention. In all other respects theymay be ofordinary construction and arrangement.

Referring to the drawing, A represents the melting-pot, arranged toswing forward and backward on a shaft B, which gives support to itslegs.

0 is a cam to advance the melting-pot, arranged to act on a roller clcarried by a lever d, which latter has its upper end pivoted between twoears (I at the top of the pot, and its lower end supported by a spring(2 seated on a stud or bolt d passing through the lever cl and throughan ear on the bottom of the pot. This lever and roller constitute aspring connection between the cam and the pot, so that a yieldingpressure is applied to the pot.

E represents the pump-lever, fixed at fulcrum c and connected at one endto the pump plunger or piston F, the lower end of which, seated in awell in the pot, serves to deliver the molten metal through the mouth ofthe pot to the mold. The pump-lever is depressed by a spiral spring 6,and is elevated at the proper time by a cam K, which acts against aroller in the lower end of the lever.

J is one of the j ustification-levers arranged to vibrate vertically.

All of the foregoing parts are of the ordinary construction andarrangement and constitute no part of my invention.

In applying my improvement I provide an angular lever H, made in onepiece, and mounted preferably, as shown, on the pot stud or bolt 61 as afulcrum, its upper end being extended upward between the ears (I of thepot in such position that when thrown to the left it will engage under aprojection h on the pump-lever to prevent the lever from falling andcatching the pump or plunger. The lower end of the stop-lever H iscarried to the right, so that it overlies the justification-lever J, andwhenever this lever is permitted to rise to an abnormal position byreason of the existence of a short matrix-line it will lift the lowerend of the lever H and engage its end with the pump-lever, thuspreventing the action of the pump and rendering the delivery of metal tothe mold impossible. I prefer to provide the lower end of the lever withan adjustable stud h extending vertically therethrough and having alock-nut on its upper end. The justification-lever acts against thelower end of this stud. By adjusting the stud the stop may be caused tooperate whenever the lever J reaches a predetermined height. Thisadjustment permits the ma chine to be operated by a greater or lessamount of space in the matrix-line, as circumstances may renderexpedient. Under ordinary circumstances the stop-lever will fall backout of engagement with the pump-lever by gravity, but a spring I iscommonly attached to the stop-lever, as shown, to throw it backward.

I am aware that a pump-locking device has been operated by thejustifying-lever in a linotype, the connections being indirect.

Having thus described my invention, what I claim is- I oo 1. In alinotype-machine and in con1bination with the pump-lever andjustificationlever, a stop-1ever having one end arranged to engage thepump-lever and the opposite 5 end arranged to be acted upon by thejustification-lever.

2. In a linotype-machine and in combination with the pot, the pump-leverand the j ustification-lever, the angular stop -1ever II 10 mounted onthe pot-stud and arranged to operate with the pump-lever andjustificationlevers, substantially as described.

3. In a linotype machine the combination of a pot, pump-lever, theangular stop-lever, its retracting-spring and the justification- 15lever.

In testimony whereof I hereunto set my hand this 28th day of January,1890, in the presence of two attesting Witnesses.

NELSON A. LARKIN. \Vitnesses JOHN L. CRAMER, FRED 0. BROWN.

